Survival with Ambiguity
We analyze a market populated by expected utility maximizers and smooth ambiguity-averse consumers. We study conditions under which ambiguity-averse consumers survive and affect prices in the limit. If ambiguity vanishes with time or if the economy exhibits no aggregate risk, ambiguity-averse consumers survive, but have no long-run impact on prices. In both scenarios, ambiguity-averse consumers are fully insured against ambiguity in equilibrium and, thus, behave as expected utility maximizers with correct beliefs. If ambiguity-averse consumers are not fully insured against ambiguity, they behave as expected utility maximizers with effectively wrong beliefs and an effective discount factor which might be higher or lower than their actual discount factor. Using this insight, we demonstrate that consumers with constant absolute ambiguity aversion vanish in expectations, whenever the economy faces aggregate risk. In contrast, consumers with constant relative (and thus, decreasing absolute) ambiguity aversion survive in expectation and with positive probability and have a non-trivial impact on prices in the limit.
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- Tarek Coury & Emanuela Sciubba, 2006.
"Belief Heterogeneity and Survival in Incomplete Markets,"
Birkbeck Working Papers in Economics and Finance
0613, Birkbeck, Department of Economics, Mathematics & Statistics.
- Tarek Coury & Emanuela Sciubba, 2012. "Belief heterogeneity and survival in incomplete markets," Economic Theory, Springer, vol. 49(1), pages 37-58, January.
- Larry Epstein & Martin Schneider, 2005.
"Ambiguity, Information Quality and Asset Pricing,"
RCER Working Papers
519, University of Rochester - Center for Economic Research (RCER).
- Leonid Kogan & Stephen Ross & Jiang Wang & Mark M. Westerfield, 2009.
NBER Working Papers
15189, National Bureau of Economic Research, Inc.
- Beker, Pablo & Subir Chattopadhyay, 2009.
"Consumption Dynamics in General Equilibrium : A Characterisation when Markets are Incomplete,"
The Warwick Economics Research Paper Series (TWERPS)
921, University of Warwick, Department of Economics.
- Beker, Pablo & Chattopadhyay, Subir, 2010. "Consumption dynamics in general equilibrium: A characterisation when markets are incomplete," Journal of Economic Theory, Elsevier, vol. 145(6), pages 2133-2185, November.
- Massimo Marinacci & Luigi Montrucchio, 2007. "Unique Solutions of Some Recursive Equations in Economic Dynamics," Carlo Alberto Notebooks 46, Collegio Carlo Alberto.
- Hongjun Yan, 2008.
"Natural Selection in Financial Markets: Does It Work?,"
INFORMS, vol. 54(11), pages 1935-1950, November.
- Hongjun Yan, 2008. "Natural Selection in Financial Markets: Does it Work?," Yale School of Management Working Papers amz2648, Yale School of Management, revised 01 May 2008.
- Jaroslav Borovicka, 2009. "Heterogeneous beliefs under recursive preferences," 2009 Meeting Papers 892, Society for Economic Dynamics.
- Shannon, Chris & Strzalecki, Tomasz & Rigotti, Luca, 2008.
"Subjective Beliefs and Ex Ante Trade,"
3637104, Harvard University Department of Economics.
- Scott Condie, 2008. "Living with ambiguity: prices and survival when investors have heterogeneous preferences for ambiguity," Economic Theory, Springer, vol. 36(1), pages 81-108, July.
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